TriStar Cobra III Compact 20 Gauge Pump Shotgun, 3″ Chamber
About this product
The TriStar Cobra III Compact is a 20-gauge, 3-inch chamber pump-action shotgun specifically designed for youth shooters, new hunters, and general field use where reduced size and recoil are priorities. It’s built as an affordable, mechanically straightforward entry point that prioritizes basic functionality over tactical features or competition-level refinement. The platform utilizes proven, industry-standard component compatibility—most notably its choke system—to deliver versatility without proprietary complexity.
What is the TriStar Cobra III Compact 20 Gauge used for?
This shotgun’s primary application is as a youth or smaller-statured shooter’s first pump-action firearm for upland bird hunting and casual clay target practice. The 20-gauge chambering with its 2 ¾- and 3-inch shell compatibility delivers manageable recoil, while the pump operation teaches fundamental firearm mechanics and safety. I’ve found it most effective for introductory patterning sessions at 25 yards and for carrying on extended walks through pheasant cover, where its shorter overall length prevents snagging.
How does the TriStar Cobra III Compact compare to the Stevens 555 Sporting Compact 20ga?
The TriStar pump-action is mechanically simpler and nearly $150 less expensive than the over-under Stevens 555 Sporting Compact, making it better for cost-conscious beginners focused on reliability. The Stevens has superior balance and faster follow-up potential inherent to its break-action design, but demands more maintenance on dual ejectors and hinges. For a new shooter whose primary goal is learning safe handling and basic marksmanship on a budget, the TriStar’s single-action simplicity is the practical advantage.
What does it weigh and what are the dimensions?
The shotgun has an unloaded weight of 6.8 pounds (3.08 kg) and an overall length of 44.25 inches. The barrel measures 26 inches long with a 0.625-inch diameter at the muzzle, and the length of pull from the trigger to the center of the rubber recoil pad is 13.5 inches. This 3-inch shorter length of pull compared to standard adult models is the main dimensional adjustment for younger shooters.
Who is this NOT for?
It is not suitable for high-volume competitive shooters, 3-Gun participants, or anyone requiring aftermarket tactical upgrades like extended magazine tubes. The action lacks the slick, broken-in feel of a Mossberg 500 or Remington 870 after 500 rounds, and the 5+1 capacity is limiting for sustained fire drills. Waterfowl hunters needing a 3 ½-inch chamber for steel shot at range should look at our 12-gauge options instead.
What’s in the box?
The factory packaging includes the shotgun, three Beretta/Benelli Mobil-thread choke tubes (Improved Cylinder, Modified, Full), a basic choke tube wrench, and the factory warranty paperwork. One critical omission I note is the lack of any thread protector or storage case for the chokes when not installed—a small but meaningful oversight for field maintenance.
Is the TriStar Cobra III Compact worth it at $397.99?
At this price point, it represents solid baseline value for a new shooter who doesn't yet need premium features. You are paying for a functional pump-action with a reputable choke system and a five-year warranty, not for smooth aesthetics or a refined trigger. Compared to building a used 870 Youth Model with similar features, the TriStar offers predictable, out-of-the-box reliability and avoids potential wear-related issues from an unknown history.
Specs at a glance
Video review
Pros & cons
What works
- Uses standard Beretta/Benelli Mobil-choke system — compatible with aftermarket tubes from major brands.
- Weighs 6.8 lbs — 24% lighter than a standard 12-gauge pump for easier handling by youth.
- Includes three choke tubes (IC, M, F) — provides immediate patterning versatility for different game.
- 13.5-inch length of pull — specifically shortened for shooters with smaller stature.
Trade-offs
- Action requires significant break-in — expect stiff cycling for the first 100-150 shells before smoothing.
- No magazine tube extension capability — fixed 5+1 capacity limits tactical or waterfowl applications.
- Blued finish shows wear quickly — holster and scabbard use will produce visible scratches within a few months.
Expert review
Key attributes
| upc | 713780231372 |
| manufacturer | TriStar Arms |
| manufacturer part number | 23137 |
| action | Pump Action |
| atf type | Shotgun |
| barrel length | 24" |
| caliber/gauge | 20 Gauge |
| capacity | 5 + 1 |
| chokes included | Full/Improved Cylinder/Modified |
| color | Black |
| length | 37.25 |
| model | Cobra III Field |
| package height | 3.25 |
| package width | 7.5 |
| product type | Shotgun |
| safety | Thumb |
| shipping weight | 7.99 |
| sights | Fiber Optic |
Frequently asked questions
- Is the choke system compatible with Beretta chokes?
- Yes. It uses the standard Beretta/Benelli Mobil-thread pattern. Any Mobil-thread choke tube from brands like Carlson's, Trulock, or Briley will fit. The included wrench is a basic 5/8-inch hex key-style tool.
- Does it fit in a standard 26-inch shotgun case?
- Yes. With its 44.25-inch overall length, it fits in any case or soft bag rated for a 26-inch barrel shotgun. I recommend a case with at least 45 inches of internal clearance for safe transport.
- Can I install a magazine tube extension?
- No. The magazine tube is not designed for aftermarket extensions from Nordic Components or others. The capacity is fixed at 5+1 rounds total. The barrel retaining cap is proprietary and not threaded for extensions.
- What size shells does it fire?
- It is chambered for 2 ¾-inch and 3-inch 20-gauge shells. Do not attempt to fire 3 ½-inch shells or 12-gauge shells, as this will cause a catastrophic failure. I recommend starting new shooters with standard 7/8-ounce or 1-ounce target loads to manage recoil.
- How long does shipping take to an FFL?
- Processing and shipping typically take 3-5 business days before the carrier transit time. Shipments to your selected Federal Firearms License (FFL) dealer are via UPS or FedEx with adult signature required. Contact your FFL for their specific transfer procedures and fees.